A企业面临购买新的机器设备和租用机器设备两种选择，会计师在项目选择时做了如下记录：若选择购买新设备则初始投资额为500万元，计划使用三年，预计三年总共现金流出量为650万元，整个投资过程NPV=800万元，盈利指数等于NPV除以现金流出量等于1.23；若选择租用设备，则初始投资为0。下列说法正确的是？

H2C2O4的pKa1和pKa2分别是1.23和4.19。当H2C2O4溶液的pH=2.60时,溶液中主要的存在型体是()

串传送指令中，源串和目的串的偏移地址由（）寄存器指出。

不是通过直接影响基础货币变动实现调控的货币政策工具是（）。

一只基金在利润分配前的份额净值是1.23元，假设每份基金分配0.05元，进行利润分配后的基金份额净值将会下降到()元。

PASSAGEONE(1)Attheageoftwelveyears,thehumanbodyisatitsmostvigorous.Ithasyettoreachitsfullsizeandstrength,anditsownerhisorherfullintelligence;butatthisagethelikelihoodofdeathisleast.Earlier,wewereinfantsandyoungchildren,andconsequentlymorevulnerable;later,weshallundergoaprogressivelossofourvigorandresistancewhich,thoughimperceptibleatfirst,willfinallybecomesosteepthatwecanlivenolonger,howeverwellwelookafterourselves,andhoweverwellsociety,andourdoctors,lookafterus.(2)Thisdeclineinvigorwiththepassingoftimeiscalledageing.Itisoneofthemostunpleasantdiscoverieswhichweallmakethatwemustdeclineinthisway,thatifweescapewars,accidentsanddiseaseweshalleventually"dieofoldage",andthatthishappensataratewhichdifferslittlefrompersontoperson,sothatthereareheavyoddsinfavorofourdyingbetweentheagesofsixty-fiveandeighty.Someofuswilldiesooner,afewwilllivelonger—onintoaninthortenthdecade.Butthechancesareagainstit,andthereisavirtuallimitonhowlongwecanhopetoremainalive,howeverluckyandrobustweare.(3)Normalpeopletendtoforgetthisprocessunlessanduntiltheyareremindedofit.Wearesofamiliarwiththefactthatmanages,thatpeoplehaveforyearsassumedthattheprocessoflosingvigorwithtime,ofbecomingmorelikelytodietheolderweget,wassomethingself-evident,likethecoolingofahotkettleorthewearing-outofapairofshoes.Theyhavealsoassumedthatallanimals,andprobablyotherorganismssuchastrees,oreventheuniverseitself,mustinthenatureofthings"wearout".(4)Mostanimalswecommonlyobservedoinfactageaswedo,ifgiventhechancetolivelongenough;andmechanicalsystemslikeawoundwatch,orthesun,doinfactanoutofenergyinaccordancewiththesecondlawofthermodynamics(热力学)(whetherthewholeuniversedoessoisamootpointatpresent).Butthesearenotanalogoustowhathappenswhenmanages.Arun-downwatchisstillawatchandcanberewound.Anoldwatch,bycontrast,becomessowornandunreliablethatiteventuallyisnotworthmending.Butawatchcouldneverrepairitself—itdoesnotconsistoflivingparts,onlyofmetal,whichwearsawaybyfriction.Wecould,atonetime,repairourselves—wellenough,atleast,toovercomeallbutthemostinstantlyfatalillnessesandaccidents.Betweentwelveandeightyyearswegraduallylosethispower;anillnesswhichattwelvewouldknockusover,ateightycanknockusout,andintoourgrave.Ifwecouldstayasvigorousasweareattwelve,itwouldtakeabout700yearsforhalfofustodie,andanother700forthesurvivorstobereducedbyhalfagain.23.Whatisageing?

23.海伦与帕里斯是以下哪种著作中的人物？

23.《建设工程施工合同（示范文本）》由（）三部分组成。

2.甲旅游公司为增值税一般纳税人，主要从事旅游服务。2019年5月有关经营情况如下：(1)提供旅游服务取得含增值税收入720.8万元，替游客向其他单位支付交通费53万元、住宿费25.44万元、门票费22.26万元，另支付本单位导游工资2.12万元。(2)将本年购入商铺对外出租，每月含增值税租金10.9万元，本月一次性收取3个月的含增值税租金32.7万元。(3)购进职工通勤用班车，取得增值税专用发票注明税额7.8万元。(4)购进广告设计服务，取得增值税专用发票注明税额0.6万元。(5)购进电信服务，取得增值税专用发票注明税额0.18万元。(6)购进会议展览服务，取得增值税专用发票注明税额2.4万元。已知：旅游服务增值税税率为6%，不动产租赁服务增值税税率为9%;取得的扣税凭证已通过税务机关认证;甲旅游公司提供旅游服务进择差额计税方法计缴增值税。要求：根据上述资料，不考虑其他因素，分析回答下列小题。（1）甲旅游公司的下列支出中，在计算当月旅游服务增值税销售额时，准予扣除的是()。

Directions:Thereare20incompletesentencesordialoguesinthispart,choosethebestanswertocompletethem.(补全句子，问题或对话)SorryIcannot________myselfclearly.

Directions:Thereare20incompletesentencesordialoguesinthispart,choosethebestanswertocompletethem.(补全句子，问题或对话)23.SorryIcannot________myselfclearly.

Directions:Thereare20incompletesentencesordialoguesinthispart,choosethebestanswertocompletethem.(补全句子，问题或对话)23.Ihopeyouwillgoonstudyingforyour__________aftergraduationfromKedeCollege.

1．达式“['2','1',2,1].includes('1',3)”的输出结果为（）。A、trueB、falseC、1D、0

以下程序的输出结果是ls1=[1,2,3,4,5]ls2=[3,4,5,6,7,8]cha1=[]foriinls2:ifinotinls1:cha1.append(i)print(cha1)

以下代码的输出结果是foriinrange(1,6):ifi%4==0:breakelse:print(i,end=’,’)